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Re: libpng issues

From: Paul Eggert
Subject: Re: libpng issues
Date: Sun, 11 Feb 2018 23:49:05 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

Elias Mårtenson wrote:
   CCLD     temacs
/bin/ld: image.o: undefined reference to symbol 'png_longjmp@@PNG16_0'
/usr/lib/libpng16.so.16: error adding symbols: DSO missing from command line

Thanks for the heads-up. What is the last command to fail when you run 'make 

Also, in src/Makefile, what are the values of PNG_CFLAGS, and of LIBIMAGE?

Also, what is the output of the following shell commands? (The session below shows the output on Fedora 27.) Is the output correct for Arch Linux?

$ pkg-config --cflags libpng
$ pkg-config --libs libpng
-lpng16 -lz
$ libpng-config --cflags
$ libpng-config --ldflags
-L/usr/lib64 -lpng16

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